Stock material or miscellaneous articles – Coated or structually defined flake – particle – cell – strand,... – Rod – strand – filament or fiber
Reexamination Certificate
2005-05-24
2005-05-24
Wu, David W. (Department: 1713)
Stock material or miscellaneous articles
Coated or structually defined flake, particle, cell, strand,...
Rod, strand, filament or fiber
C428S383000, C428S380000, C524S571000, C524S572000, C524S584000, C524S570000, C524S556000, C524S549000, C524S548000
Reexamination Certificate
active
06896963
ABSTRACT:
A two-part sizing system for making colorless, densified fiber pellets of a reinforcing fiber material. The densified product may be advantageously produced by first applying a precursor size composition to reinforcing fiber strands, chopping the reinforcing fiber strands into chopped strand segments, applying a binder size, and densifying the chopped strand segments to form densified fiber pellets. The binder size is formulated using a copolymer of maleic anhydride which generates a product free from discoloration. In the process of making the pellets, the sized chopped strands are densified by tumbling in a rotating chamber for a period of time sufficient to increase their density but insufficient to degrade the fibers to a point where composite articles formed from such pellets have lower tensile or impact strengths than comparable composite articles formed from unpelletized strand segments.
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JP 3-181528 (abstract in English).*
JP 60-46951 A (abstract in English).
Masson Nadia A.
Piret Willy H.
Eckert Inger H.
Gacaway Maria C.
Lee Rip A.
Owens Corning Composites SPRL
Wu David W.
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